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Cheap flights from St. Louis to Sofia from $485

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 11/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 6:40 pmSTL-SOF
18h 35m2 stops
Multiple Airlines Logo
2:00 pm - 1:30 pmSOF-STL
31h 30m1 stop
$584Multiple Airlines
Find Deal
lun., mar. 30 - mar., abr. 7
Multiple Airlines Logo
4:05 pm - 11:10 pmSTL-SOF
23h 05m2 stops
Multiple Airlines Logo
7:25 pm - 1:30 pmSOF-STL
26h 05m2 stops
$590Multiple Airlines
Find Deal
lun., mar. 30 - mar., abr. 7
United Airlines Logo
4:50 pm - 1:35 pmSTL-SOF
13h 45m1 stop
United Airlines Logo
6:10 am - 7:48 pmSOF-STL
21h 38m2 stops
$652United Airlines
Find Deal
vie., mar. 27 - mar., mar. 31
United Airlines Logo
4:50 pm - 6:20 pmSTL-SOF
18h 30m2 stops
United Airlines Logo
6:10 am - 7:48 pmSOF-STL
21h 38m2 stops
$676United Airlines
Find Deal
vie., mar. 27 - mar., mar. 31
Multiple Airlines Logo
9:30 am - 12:05 pmSTL-SOF
18h 35m3 stops
Multiple Airlines Logo
6:10 am - 3:24 pmSOF-STL
41h 14m2 stops
$913Multiple Airlines
Find Deal
lun., mar. 30 - mar., abr. 7
Air Canada Logo
9:30 am - 12:05 pmSTL-SOF
18h 35m3 stops
Air Canada Logo
6:10 am - 9:04 pmSOF-STL
22h 54m3 stops
$1,236Air Canada
Find Deal
lun., mar. 30 - mar., abr. 7

United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets
United Airlines
Mar 27
STL4:50 pmLambert-St Louis
13h 45m
1 stop
SOF1:35 pmSofia
Mar 31
SOF6:10 amSofia
21h 38m
2 stops
STL7:48 pmLambert-St Louis
$652
Find similar
United Airlines
Mar 27
STL4:50 pmLambert-St Louis
18h 30m
2 stops
SOF6:20 pmSofia
Mar 31
SOF6:10 amSofia
21h 38m
2 stops
STL7:48 pmLambert-St Louis
$676
Find similar
United Airlines
Nov 5
STL12:31 pmLambert-St Louis
21h 49m
2 stops
SOF6:20 pmSofia
Nov 18
SOF6:00 amSofia
24h 45m
2 stops
STL10:45 pmLambert-St Louis
$767
Find similar

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets
Lufthansa
Nov 5
STL3:50 pmLambert-St Louis
14h 00m
1 stop
SOF1:50 pmSofia
Nov 12
SOF7:05 pmSofia
34h 35m
2 stops
STL9:40 pmLambert-St Louis
$725
Find similar
Lufthansa
Nov 5
STL6:43 pmLambert-St Louis
15h 37m
2 stops
SOF6:20 pmSofia
Nov 14
SOF6:10 amSofia
25h 32m
2 stops
STL11:42 pmLambert-St Louis
$764
Find similar
Lufthansa
Nov 5
STL3:50 pmLambert-St Louis
18h 10m
1 stop
SOF6:00 pmSofia
Nov 14
SOF6:10 amSofia
25h 32m
2 stops
STL11:42 pmLambert-St Louis
$780
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated noviembre 4, 2025.
Use the filters below to find and compare flights from St. Louis to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

lun. 3/30

4:05 pm-6:40 pm

2 stops18h 35m

Sofia

mar. 4/7

2:00 pm-1:30 pm

1 stop31h 30m

$584

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

lun. 3/30

4:05 pm-11:10 pm

2 stops23h 05m

Sofia

mar. 4/7

7:25 pm-1:30 pm

2 stops26h 05m

$590

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

vie. 3/27

4:50 pm-1:35 pm

1 stop13h 45m

Sofia

mar. 3/31

6:10 am-7:48 pm

2 stops21h 38m

$652

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

vie. 3/27

4:50 pm-6:20 pm

2 stops18h 30m

Sofia

mar. 3/31

6:10 am-7:48 pm

2 stops21h 38m

$676

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

lun. 3/30

9:30 am-12:05 pm

3 stops18h 35m

Sofia

mar. 4/7

6:10 am-3:24 pm

2 stops41h 14m

$913

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

lun. 3/30

9:30 am-12:05 pm

3 stops18h 35m

Sofia

mar. 4/7

6:10 am-9:04 pm

3 stops22h 54m

$1,236

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mié. 11/12

3:50 pm-9:20 pm

2 stops45h 30m

$485

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mié. 11/12

4:05 pm-8:25 pm

3 stops20h 20m

$492

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mié. 11/12

3:50 pm-6:00 pm

1 stop18h 10m

$559

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Sofia?

What is the cheapest day to depart on your flight to Sofia?

According to our data, Saturday is the cheapest day to fly to Sofia from St. Louis. The lowest ticket price found for a Saturday departure recently was $1,095. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from St. Louis to Sofia on a Friday will generally be more expensive and average around $1,306. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the morning is the cheapest time of day to fly from St. Louis to Sofia when you can find flight prices for as low as $1,199. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,335 per ticket.

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $946 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from St. Louis for as low as $799 on momondo.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 13% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Direct flights

None
There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.
Search flight deals

  • How far is Lambert-St Louis to Sofia by plane?

    A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 13h 45m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

    Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sofia?

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $669Free CancellationRating
6.8
7,552 reviews
Search Lufthansa flights
United AirlinesPriceFrom $711Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

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Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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